(19)

(11)

EP 0 497 968 A1

(12)

(43) Date of publication: 12.08.1992 Bulletin 1992/33 (21) Application number: 91917452.0 (22) Date of filing: 24.06.1991

(51) International Patent Classification (IPC):  B29C 39/ 02( . ) C08F 20/ 18( . ) C08F 265/ 06( . ) C08K 3/ 00( . ) C08L 33/ 12( . ) B29C 51/ 00( . ) C08F 220/ 10( . ) C08J 5/ 18( . ) C08L 33/ 04( . ) (86) International application number: PCT/US1991/004441 (87) International publication number: WO 1992/003497 (05.03.1992 Gazette 1992/06)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 27.08.1990 US 19900572831 (71) Applicant: Aristech Chemical Corporation Pittsburgh, PA 15230-0250 (US)	(72) Inventors: MINGHETTI, Ettore Florence, KY 41042 (US) EITEL, John, E. Florence, KY 41042 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät  Maximilianstrasse 58 D-80538 München D-80538 München (DE)